class Solution(object):
    def groupAnagrams(self, strs):
        """
给你一个字符串数组，请你将 字母异位词 组合在一起。可以按任意顺序返回结果列表。

字母异位词 是由重新排列源单词的字母得到的一个新单词，所有源单词中的字母通常恰好只用一次。

 

示例 1:

输入: strs = ["eat", "tea", "tan", "ate", "nat", "bat"]
输出: [["bat"],["nat","tan"],["ate","eat","tea"]]

示例 2:

输入: strs = [""]
输出: [[""]]

示例 3:

输入: strs = ["a"]
输出: [["a"]]

        :type strs: List[str]
        :rtype: List[List[str]]
        """
        result = dict()

        for word in strs:
            sorted_word = ''.join(sorted(word))
            if sorted_word in result:
                result[sorted_word].append(word)
            else:
                result[sorted_word] = [word]
        
        return [result[w] for w in result]


if __name__ == "__main__":
    print(Solution().groupAnagrams(["eat","tea","tan","ate","nat","bat"]))